郯庐断裂带的分段性研究  

Research on the Segmentation of Tancheng—Lujiang Fault Zone

作　　者：张鹏[1] 王良书[1] 钟锴[1,2] 丁增勇[1] 

机构地区：[1]南京大学地球科学系 [2]中海石油研究中心,北京100027

出　　处：《地质论评》2007年第5期586-591,721-722,共8页Geological Review

基　　金：中石化胜利油田公司项目<郯庐断裂带构造体制转换与山东段西侧油气盆地演化>资助成果。

摘　　要：本文从航磁、重力以及地学断面等地球物理资料入手,对郯庐断裂(即郯城—庐江断裂)带地球物理场和深部构造特征进行了分析;在总结前人研究成果的基础上,探讨了郯庐断裂带的各段的运动学性质,并对郯庐分段差异性的成因地球动力学过程进行了探讨。研究表明郯庐断裂带各段的地球物理场和深部构造特征及演化过程都存在着显著的差异。华南与华北板块的碰撞造山过程主要影响郯庐断裂带中南段的活动,而西太平洋俯冲的弧后扩张作用及由此产生的地幔底辟则是沈阳—渤海段活动的主控因素。中国东部中生代以来多期地质事件造成区域构造动力多次改变,使郯庐断裂带经历了多期的构造体制转换,并造成了各段活动特征的巨大差异性。Based on aeromagnetic data, gravity data and geoscience transect ,we analyse the characteristics of geophysics field and deep structures of the Tan-Lu （Tancheng—Lujiang） fault zone. Furthermore, integrated with former research results, the kinematic characteristics of each segment of Tan-Lu fault zone and the generation mechanisms of its segmentation are discussed. The results show that there are remarkable distinction in geophysics field ,deep structures and evolution of each segment. The collisional orogenesis between the North and South China plates mainly effected on the middle and south segments of Tan-Lu fault zone. However the north segment was controlled by the back-arc spreading and mantle diapir ,due to the subduction of Pacific plate. The eastern China has different tectonic background and dynamics in different periods since Mesozoic, resulting in the multi-stage tectonic regime transformation of the Tan-Lu fault zone, and the different characteristics of each segment.

关 键 词：郯庐断裂带 地球物理场 分段性 中新生代 

分 类 号：P542[天文地球—构造地质学]